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dc.contributor.authorYu, Han
dc.contributor.authorZhang, Dongliang
dc.contributor.authorWang, Xin
dc.date.accessioned2015-08-03T11:47:58Z
dc.date.available2015-08-03T11:47:58Z
dc.date.issued2014-03
dc.identifier.issn09269851
dc.identifier.doi10.1016/j.jappgeo.2014.01.003
dc.identifier.urihttp://hdl.handle.net/10754/563414
dc.description.abstractSeismic imaging of deep land targets is usually difficult since the near-surface velocities are not accurately estimated. Recent studies have shown that inverting traces weighted by the energy of the early-arrivals can improve the accuracy of estimating shallow velocities. In this work, it is explained by showing that the associated misfit gradient function tends to be sensitive to the kinetics of wave propagation and insensitive to the dynamics. A synthetic example verifies the theoretical predictions and shows that the effects of noise and unpredicted amplitude variations in the inversion are reduced using this weighted early arrival waveform inversion (WEWI). We also apply this method to a 2D land data set for estimating the near-surface velocity distribution. The reverse time migration images suggest that, compared to the tomogram inverted directly from the early arrival waveforms, the WEWI tomogram provides a more convincing velocity model and more focused reflections in the deeper part of the image. © 2014 Elsevier B.V.
dc.publisherElsevier BV
dc.subjectEarly arrival
dc.subjectPhase match
dc.subjectWaveform inversion
dc.subjectWeighting
dc.titleApplication of weighted early-arrival waveform inversion to shallow land data
dc.typeArticle
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Division
dc.identifier.journalJournal of Applied Geophysics
kaust.personYu, Han
kaust.personZhang, Dongliang
kaust.personWang, Xin


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